Circuit arrangement for producing two frequency independent mutually phase shifted output a.c. voltages from two input a.c. voltages

Claim 2

In a circuit arrangement for producing two output a.c. voltages having a mutual phase shift at least approximately independent of frequency from two input a.c. voltages, the combination comprising a first voltage divider and a first phase shift unit to which one of said input a.c. voltages is applied, a second voltage divider and a second phase shift unit to which the other input a.c. voltage is applied, respective tapping points on said first and second voltage dividers connected to each other and to an output terminal common to both of the output a.c. voltages to be produced, said first and second phase shift units each consisting of resistances and of reactances of the same kind, means providing a first tap betWeen reactances of said first phase shift unit to establish one of said output a.c. voltages between said first tap and said common output terminal, and means providing a second tap between the resistances of said second phase shift unit to establish the other output a.c. voltage between said second tap and said common output terminal.

Claim 3

A circuit arrangement as defined in claim 1 for providing two frequency independent output a.c. voltages mutually shifted in phase wherein said first and second phase shift units are of such construction that the resistance-reactance ratio of each unit is variable.

Claim 4

A circuit arrangement as defined in claim 1 for providing two frequency independent output a.c. voltages mutually shifted in phase wherein said first phase shift unit includes a resistor and two capacitors between which said first tap is made, and wherein said second phase shift unit includes a capacitor and two resistances between which said second tap is made, said resistances and capacitors of said first and second phase shift units being respectively connected in series.

Claim 5

A circuit arrangement as defined in claim 3 for providing two frequency independent output a.c. voltages wherein the ratio of the capacitances of the two capacitors of said first phase shift unit is adjustable.

Claim 6

A circuit arrangement as defined in claim 3 for providing two frequency independent output a.c. voltages wherein the ratio of the resistances of the two resistors of said second phase shift unit is adjustable.

Claim 7

A circuit arrangement as defined in claim 1 for providing two frequency independent output a.c. voltages wherein said first and second voltage dividers are each constituted by resistors connected in series and between which said tapping points are made.

Claim 8

A circuit arrangement as defined in claim 1 for providing two frequency independent output a.c. voltages wherein said first and second voltage dividers each include a transformer having taps on the windings thereof.

Claim 9

In a circuit arrangement for producing two output a.c. voltages having a mutual phase shift at least approximately independent of frequency from two input a.c. voltages, the combination comprising a first voltage divider and a first phase shift unit to which one of said input a.c. voltages is applied, a second voltage divider and a second phase shift unit to which the other input a.c. voltage is applied, respective tapping points on said first and second voltage dividers connected to each other and to an output terminal common to both of the output a.c. voltages to be produced, said first and second phase shift units each consisting of resistances and reactances of the same kind, means providing a first tap between reactances of said first phase shift unit to establish one of said output a.c. voltages between said first tap and said common output terminal, and means providing a second tap between the resistances of said second phase unit to establish the other output a.c. voltage between said second tap and said common output terminal, said reactances of said first phase shift unit and said resistances of said second phase shift unit being divided by said first and second tapping respectively in such a ratio as to produce a phase shift of substantially 90* between said first and second output a.c. voltages.

Claim 10

In a circuit arrangement for producing two output a.c. voltages having a mutual phase shift at least approximately independent of frequency from two input a.c. voltages, the combination comprising a first voltage divider and a first phase shift unit to which one of said input a.c. voltages is applied, a second voltage divider and a second phase shift unit to which the other input a.c. voltage is applied, respective tapping points on said first and second voltage dividers connected to each other and to an output terminal common to both of the output a.c. voltages to be produced, said first and second phase shift units each consisting of resistances and reactances of the same kind, means providing a first tap between reactances of said first phase shift unit to establish one of said output a.c. voltages between said first tap and said common output terminal, and means providing a second tap between the resistances of said second phase unit to establish the other output a.c. voltage between said second tap and said common output terminal, said reactances of said first phase shift unit and said resistances of said second phase shift unit being divided by said first and second tapping respectively in such a ratio as to produce a phase shift of substantially 90* between said first and second output a.c. voltages.